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Definition of Disconfirmation
1. Noun. (chiefly philosophy uncountable) Introduction of evidence which conclusively establishes that a belief or hypothesis is not true or which diminishes the acceptability of a belief or hypothesis. ¹
2. Noun. A particular fact, observation, or other item of evidence which shows or tends to show that a belief or hypothesis is not true. ¹
¹ Source: wiktionary.com